Fdr 400 over Big Box Branch
FairVernon Parish, Louisiana · 8.0 M. W. of Cravens · Structure no. 080605000002502
- Built
- 1970
- 55 years old
- Condition
- Fair
- inspected January 2023
- Type
- Channel Beam
- Prestressed Concrete
- Length
- 35 ft
- 2 main spans
- Daily traffic
- 110
- 1976 count
- Owner
- Federal
- U.S. Forest Service
About this bridge
Fdr 400 over Big Box Branch is a prestressed concrete channel beam carrying Fdr 400 over Big Box Branch in Vernon Parish, Louisiana. It was built in 1970, so it is 55 years old, older than the Louisiana average of 43 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 110 vehicles a day, roughly 20% of them trucks, projected to reach 165 by 2045. The structure is 35 ft (10.7 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Fdr 400 over Big Box Branch built?
It was built in 1970, making it 55 years old in 2025.
What condition is Fdr 400 over Big Box Branch in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2023.
How much traffic does Fdr 400 over Big Box Branch carry?
About 110 vehicles per day (1976 count), of which roughly 20% are trucks.
How long is Fdr 400 over Big Box Branch?
The structure is 35 ft (10.7 m) long with a longest span of 17 ft (5.2 m) and a deck 25 ft wide.
Who owns Fdr 400 over Big Box Branch?
It is owned by the U.S. Forest Service.